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Dwell Time (radar)
Dwell time (''TD'') in surveillance radar Radar is a system that uses radio waves to determine the distance ('' ranging''), direction ( azimuth and elevation angles), and radial velocity of objects relative to the site. It is a radiodetermination method used to detect and track ... is the time that an antenna beam spends on a target. The dwell time of a 2D–search radar depends predominantly on * the antenna's horizontal beam width ''θAZ'', and * the turn speed ''n'' of the antenna (in rotations per minute or rpm, i.e. 360 degrees in 60 seconds = multiplied by a factor of 6). Dwell time is calculated by: :T_D = \frac \quad\quad \text A block of constant PRF and coherently phased RF pulses, is referred to as a coherent dwell interval or coherent dwell time.P.E. Rademacher; B.H. Cantrell; G.C. TavikClutter filtering and processing techniques for EMI detection and angle measurement in pulse Doppler radars 2021, References {{CC-notice , cc=bysa3 , url=http://www.ra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radar
Radar is a system that uses radio waves to determine the distance ('' ranging''), direction ( azimuth and elevation angles), and radial velocity of objects relative to the site. It is a radiodetermination method used to detect and track aircraft, ships, spacecraft, guided missiles, motor vehicles, map weather formations, and terrain. The term ''RADAR'' was coined in 1940 by the United States Navy as an acronym for "radio detection and ranging". The term ''radar'' has since entered English and other languages as an anacronym, a common noun, losing all capitalization. A radar system consists of a transmitter producing electromagnetic waves in the radio or microwave domain, a transmitting antenna, a receiving antenna (often the same antenna is used for transmitting and receiving) and a receiver and processor to determine properties of the objects. Radio waves (pulsed or continuous) from the transmitter reflect off the objects and return to the receiver, giving ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
